Subject:
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Re: Pseudocode
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 20 Sep 1997 18:34:17 GMT
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Original-From:
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Jeffrey Strauss Morehead <morehead@ece.utexas.AVOIDSPAMedu>
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Viewed:
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1264 times
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I think what you may be wondering is how does the code do all this at
once instead of sequentially as normal code runs. If you are not
wondering this then I'll tell you anyway. The awesome feature of the
handyboard is the pcode. The pcode is a multithreaded OS on the HB.
You write a process (or function:see the code manual on the web) and the
pcode time slices each one. It runs each process for a ms then runs the
next one and so on.
This is what makes your program simple. You just write code that
runs while no flag is present from the sensor processes. Then you have
processes that handle the errors and reset flags. The pcode handles the
multitasking through timeslicing. Perfect for robotics.
jm
On Fri, 19 Sep 1997, Karl Altenburg wrote:
> On Fri, 19 Sep 1997, jackedIN wrote:
> > If i design a simple robot that simply (to some ppl, heh) moves around on
> > the floor scanning for things so it may take appropriate action to avoid
> > hitting them, just how would someone program that.
>
> One thing to remember: the input is the world (through the sensors) and
> the output are the robots actions on the world.
>
> A program outline
>
> repeat
> turn on drive motors
> repeat
> read wall/obstacle sensor
> until sensor reads an obstacle
> stop motors
> reverse motors a few seconds
> stop motors
> if wall was to the left
> turn right a few seconds
> else
> turn left a few seconds
> stop motors
> until universe blows up
>
>
> Karl R Altenburg altenbur@plains.NoDak.edu
> North Dakota State University
> Fargo, ND 58105 http://www.acm.ndsu.NoDak.edu/~altenbur
> All things are artificial, for nature is the art of God. SIR THOMAS BROWNE
>
>
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Message is in Reply To:
 | | Re: Pseudocode
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| (...) One thing to remember: the input is the world (through the sensors) and the output are the robots actions on the world. A program outline repeat turn on drive motors repeat read wall/obstacle sensor until sensor reads an obstacle stop motors (...) (27 years ago, 19-Sep-97, to lugnet.robotics.handyboard)
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